1100% is the change from 40 to 480
Calculation steps:
[( 480 - 40 ) ÷ 40] x 100 = 1100%
Formula
Percentage change = [(480 - 40) / 40] x 100
Subtract the new number by the original number
480 - 40 = 440
440 ÷ 40 = 11
11 x 100 = 1100%
Example